BY UZMA ALEEM
Shahid Awan, a former van driver who now works as a daily wages worker in a factory, bears scolds and abuses of his contractor for not fulfilling all the given tasks because of his partial deafness. The problem of hearing impairment gradually occurred because of his old occupation as the accumulated exposure to traffic noise led to partial deafness.
The case of Shahid Awan is not the only case of hearing impairment. Since noise pollution does not only affect hearing rather it causes mental fatigue, cardiac arrest, restlessness and frustration, while raising anger, anxiety, blood pressure that ultimately reduces people’s morale, motivation and judgment. Moreover noise pollution also retards student learning ability and concentration.
During the past thirty years, noise in all areas, especially in urban areas, has been increasing rapidly. In Pakistan, there is no proper implementation of laws regarding noise emanating from vehicle horns, railway engines, air crafts, airport or industrial and construction activities.
Though public complaints on noise pollution are often received in the federal and provincial environmental protection agencies, yet they have rarely taken any legal action.
It is pertinent to note that road traffic noise is most widespread source of noise nuisance in the urban areas of Pakistan. The situation is getting alarming with increase in traffic density on city roads, particularly in Lahore.
Environmental Protection Agency of Pakistan exercises its power under clause (d) of Section 6(1) of the Pakistan Environmental Protection Ordinance, 1983 with the approval of the Pakistan Environmental Protection Council established National Environmental Quality Standards, for motor vehicle exhaust and noise.
Pakistan NEQS for motor vehicle noise allows the maximum permissible noise emission limit of 85 dB for new vehicles at a distance of 7.5 metres from the source without specifying the type of motor vehicle and measuring technique.
Most of the areas of Lahore and other major cities are subjected to unacceptable noise conditions due to construction, manufacturing, traffic and recreational activities. But unfortunately, no national survey has been conducted to assess noise level in cities. However, random tests in different cities showed that the noise level in most of areas was as high as 70-90 dB which was much higher that the acceptable limits. The major source of this increasing noise pollution on roads is unnecessary and uncivilized usage of horn.
Taufeeq Ahmad, a retail and wholesale dealer of Horns, told S+ various types of Horns were available in market. But around six major kinds of horns were most sold i.e. Single stage horn, double level horn (commonly known as double pressure horn), little speaker horn, Multiple stages/circuits horn, broad band horn, high performance electronic horn. “Broad band horns and high performance electronic horns are being import from China. Three tones are available in the electronic horn range and almost forty ranges in the high-performance horns are available to better differentiate from ambient noise. Step less volume control via potentiometer is used in electronic horns instead of mechanical screw to accommodate fluctuating ambient noise. However people do not prefer these horns because of their expensive rates and lack of shrill in their sounds. Whereas the multiple stages horns and double level horns are mostly liked by drivers of vehicles of public transport like motorcycle rickshaws, buses, vans and coasters etc”, he added.
Though high pressure horns are banned yet some of the private vans’ drivers also prefer horns with little speakers. So on the demand of consumers, sale of these types of horns is highest.
While talking about the latest technological horns, Tabeer Mustafa, a former engineer of Railways of Pakistan said that a very interesting technology was the “Broad Band” horn, developed in England for the Noise Abatement Society there, and tried out in 2003, very successfully - it could not spread out as much as Chinese and Pakistani horns - these were considered much less disturbing to neighbours. Some US rail lines had apparently bolted plates onto the horns to get the same effect.
However in Pakistan noise pollution is on a rapid increase because of lack of road sense and irresponsible behaviour of masses and government towards noise pollution. Although the Motor Vehicle Rules, 1969 (Section 154, 155 and 158) guarantees the absence of noise pollution through following clauses:
• No motor vehicle shall be fitted with and multilinked horn giving a succession of different note or with any other sound producing device giving an unduly harsh, shrill , loud or alarming noise on other similar vehicles of such sound signals.
• Every motor vehicle shall be fitted with a device (therein after referred to as a silencer) which by means of an expansion chamber or otherwise reduce as far as may be reasonable and practicable the noise that would otherwise be made by the escape of exhaust gases from the engine.
• Every motor vehicle shall be so constructed and maintained as not to cause undue noise when in motion.
According to environmental protection department of Punjab, government of Punjab constituted a committee to address the issue of use of pressure horns. A number of meetings had been held in the past and more than 80 percent illegal horns were removed from intra city route buses of Lahore.
Awareness raising campaigns regarding noise pollution were also initiated like Blue area in Islamabad and Jail road in Lahore had been declared as silence zones (no horn blowing allowed). Despite these efforts of government any significant change in the environment of metropolis could not be observed. Lack of commitment of government and indifferent approach of masses made the situation worse. The level of noise has exceeded the maximum limit in most of the areas of Lahore. As Naseem Ahmad of EPA told the city was being hit by the worst levels of noise pollution. “Around 55 decibels in residential areas and 75 decibel levels in commercial areas should be mandated to reduce noise pollution,” said the Assistant director EPA
“Whereas we recorded 73 to 91 decibels at Shadman Chowk, 90 at Circular Road, 85 at Kalma Chowk, 98 at Azadi Chowk, 93 at General Post Office Chowk and 91 to 100 decibels at Railway Station,” he explained.
Medical survey reports and studies also reflect impact of noise pollution on public health. According to a cross-sectional and descriptive study of ENT Department, Sir Ganga Ram Hospital, Lahore, several commuters and drivers of public transport drivers are exposed to excess noise on roads in Lahore and most of them are suffering from noise induced hearing loss.
This report stated that 65 percent of the people including drivers had noise induced hearing loss. (NIHL) 25 percent had normal hearing threshold and 10 percent had disabling hearing loss in Lahore.
There is no doubt that there is excess noise on roads in all major cities in Pakistan but the situation has become worse in Lahore with more than 3 million vehicles running on roads. According to ISO standard noise levels on roads should not exceed 70 dB. In Lahore, the noise limit on roads laid down by National Environment Quality Standards is 85-90 dB with in the radius of 7.5 meters. Also the Motor Vehicle Rules 1969: Section 158 states that every motor shall be so constructed and maintained as not to cause noise when in motion. But the fact is other wise and noise levels on roads average around 90 dB. This excessive noise on roads in Lahore city has resulted in hearing loss (from mild to acute level) in 75 percent of the commuters. “This NIHL will continue if corrective action is not taken. More over NIHL is progressive if noise pollution is not controlled and this hearing loss is irreversible. What damage has been done cannot be corrected, only prevention is the treatment of NIHL”, Dr. Shahzad Mirza explained.
“Hearing loss is not only one of the hazards of noise. Prolonged or excessive exposure to noise, whether in community or at work place, can cause permanent medical conditions as hypertension and ischemic heart disease. Noise can adversely affect performance, attentiveness, and memory. On roads or in industry these deficits in performance can lead to accidents. Noise above 80 dB may increase aggressive behaviour, and can result in changes in social behaviour. The main social consequence of hearing impairment is the inability to understand speech in normal conditions, which is considered severe social handicap,” he added.
While talking about the preventions he told noise control measures could be in the form of various type of engineering, personal protection, and administrative approaches. Most important was awareness among community about the health hazards of noise pollution. Moreover the government should ensure smooth traffic flows to minimise noise pollution since horns are mostly used in traffic jams.
Random tests in different cities showed that the noise level in most of areas was as high as 70-90 dB which was much higher that the acceptable limits. The major source of this increasing noise pollution on roads is unnecessary usage of horn.
Around 55 decibels in residential areas and 75 decibel levels in commercial areas should be mandated to reduce noise pollution. 73 to 91 decibels at Shadman Chowk, 90 at Circular Road, 85 at Kalma Chowk, 98 at Azadi Chowk, 93 at General Post Office Chowk and 91 to 100 decibels at Railway Station have been recorded.
Shahid Awan, a former van driver who now works as a daily wages worker in a factory, bears scolds and abuses of his contractor for not fulfilling all the given tasks because of his partial deafness. The problem of hearing impairment gradually occurred because of his old occupation as the accumulated exposure to traffic noise led to partial deafness.
The case of Shahid Awan is not the only case of hearing impairment. Since noise pollution does not only affect hearing rather it causes mental fatigue, cardiac arrest, restlessness and frustration, while raising anger, anxiety, blood pressure that ultimately reduces people’s morale, motivation and judgment. Moreover noise pollution also retards student learning ability and concentration.
During the past thirty years, noise in all areas, especially in urban areas, has been increasing rapidly. In Pakistan, there is no proper implementation of laws regarding noise emanating from vehicle horns, railway engines, air crafts, airport or industrial and construction activities.
Though public complaints on noise pollution are often received in the federal and provincial environmental protection agencies, yet they have rarely taken any legal action.
It is pertinent to note that road traffic noise is most widespread source of noise nuisance in the urban areas of Pakistan. The situation is getting alarming with increase in traffic density on city roads, particularly in Lahore.
Environmental Protection Agency of Pakistan exercises its power under clause (d) of Section 6(1) of the Pakistan Environmental Protection Ordinance, 1983 with the approval of the Pakistan Environmental Protection Council established National Environmental Quality Standards, for motor vehicle exhaust and noise.
Pakistan NEQS for motor vehicle noise allows the maximum permissible noise emission limit of 85 dB for new vehicles at a distance of 7.5 metres from the source without specifying the type of motor vehicle and measuring technique.
Most of the areas of Lahore and other major cities are subjected to unacceptable noise conditions due to construction, manufacturing, traffic and recreational activities. But unfortunately, no national survey has been conducted to assess noise level in cities. However, random tests in different cities showed that the noise level in most of areas was as high as 70-90 dB which was much higher that the acceptable limits. The major source of this increasing noise pollution on roads is unnecessary and uncivilized usage of horn.
Taufeeq Ahmad, a retail and wholesale dealer of Horns, told S+ various types of Horns were available in market. But around six major kinds of horns were most sold i.e. Single stage horn, double level horn (commonly known as double pressure horn), little speaker horn, Multiple stages/circuits horn, broad band horn, high performance electronic horn. “Broad band horns and high performance electronic horns are being import from China. Three tones are available in the electronic horn range and almost forty ranges in the high-performance horns are available to better differentiate from ambient noise. Step less volume control via potentiometer is used in electronic horns instead of mechanical screw to accommodate fluctuating ambient noise. However people do not prefer these horns because of their expensive rates and lack of shrill in their sounds. Whereas the multiple stages horns and double level horns are mostly liked by drivers of vehicles of public transport like motorcycle rickshaws, buses, vans and coasters etc”, he added.
Though high pressure horns are banned yet some of the private vans’ drivers also prefer horns with little speakers. So on the demand of consumers, sale of these types of horns is highest.
While talking about the latest technological horns, Tabeer Mustafa, a former engineer of Railways of Pakistan said that a very interesting technology was the “Broad Band” horn, developed in England for the Noise Abatement Society there, and tried out in 2003, very successfully - it could not spread out as much as Chinese and Pakistani horns - these were considered much less disturbing to neighbours. Some US rail lines had apparently bolted plates onto the horns to get the same effect.
However in Pakistan noise pollution is on a rapid increase because of lack of road sense and irresponsible behaviour of masses and government towards noise pollution. Although the Motor Vehicle Rules, 1969 (Section 154, 155 and 158) guarantees the absence of noise pollution through following clauses:
• No motor vehicle shall be fitted with and multilinked horn giving a succession of different note or with any other sound producing device giving an unduly harsh, shrill , loud or alarming noise on other similar vehicles of such sound signals.
• Every motor vehicle shall be fitted with a device (therein after referred to as a silencer) which by means of an expansion chamber or otherwise reduce as far as may be reasonable and practicable the noise that would otherwise be made by the escape of exhaust gases from the engine.
• Every motor vehicle shall be so constructed and maintained as not to cause undue noise when in motion.
According to environmental protection department of Punjab, government of Punjab constituted a committee to address the issue of use of pressure horns. A number of meetings had been held in the past and more than 80 percent illegal horns were removed from intra city route buses of Lahore.
Awareness raising campaigns regarding noise pollution were also initiated like Blue area in Islamabad and Jail road in Lahore had been declared as silence zones (no horn blowing allowed). Despite these efforts of government any significant change in the environment of metropolis could not be observed. Lack of commitment of government and indifferent approach of masses made the situation worse. The level of noise has exceeded the maximum limit in most of the areas of Lahore. As Naseem Ahmad of EPA told the city was being hit by the worst levels of noise pollution. “Around 55 decibels in residential areas and 75 decibel levels in commercial areas should be mandated to reduce noise pollution,” said the Assistant director EPA
“Whereas we recorded 73 to 91 decibels at Shadman Chowk, 90 at Circular Road, 85 at Kalma Chowk, 98 at Azadi Chowk, 93 at General Post Office Chowk and 91 to 100 decibels at Railway Station,” he explained.
Medical survey reports and studies also reflect impact of noise pollution on public health. According to a cross-sectional and descriptive study of ENT Department, Sir Ganga Ram Hospital, Lahore, several commuters and drivers of public transport drivers are exposed to excess noise on roads in Lahore and most of them are suffering from noise induced hearing loss.
This report stated that 65 percent of the people including drivers had noise induced hearing loss. (NIHL) 25 percent had normal hearing threshold and 10 percent had disabling hearing loss in Lahore.
There is no doubt that there is excess noise on roads in all major cities in Pakistan but the situation has become worse in Lahore with more than 3 million vehicles running on roads. According to ISO standard noise levels on roads should not exceed 70 dB. In Lahore, the noise limit on roads laid down by National Environment Quality Standards is 85-90 dB with in the radius of 7.5 meters. Also the Motor Vehicle Rules 1969: Section 158 states that every motor shall be so constructed and maintained as not to cause noise when in motion. But the fact is other wise and noise levels on roads average around 90 dB. This excessive noise on roads in Lahore city has resulted in hearing loss (from mild to acute level) in 75 percent of the commuters. “This NIHL will continue if corrective action is not taken. More over NIHL is progressive if noise pollution is not controlled and this hearing loss is irreversible. What damage has been done cannot be corrected, only prevention is the treatment of NIHL”, Dr. Shahzad Mirza explained.
“Hearing loss is not only one of the hazards of noise. Prolonged or excessive exposure to noise, whether in community or at work place, can cause permanent medical conditions as hypertension and ischemic heart disease. Noise can adversely affect performance, attentiveness, and memory. On roads or in industry these deficits in performance can lead to accidents. Noise above 80 dB may increase aggressive behaviour, and can result in changes in social behaviour. The main social consequence of hearing impairment is the inability to understand speech in normal conditions, which is considered severe social handicap,” he added.
While talking about the preventions he told noise control measures could be in the form of various type of engineering, personal protection, and administrative approaches. Most important was awareness among community about the health hazards of noise pollution. Moreover the government should ensure smooth traffic flows to minimise noise pollution since horns are mostly used in traffic jams.
Random tests in different cities showed that the noise level in most of areas was as high as 70-90 dB which was much higher that the acceptable limits. The major source of this increasing noise pollution on roads is unnecessary usage of horn.
Around 55 decibels in residential areas and 75 decibel levels in commercial areas should be mandated to reduce noise pollution. 73 to 91 decibels at Shadman Chowk, 90 at Circular Road, 85 at Kalma Chowk, 98 at Azadi Chowk, 93 at General Post Office Chowk and 91 to 100 decibels at Railway Station have been recorded.